High voltage bus structure



July 5, 1960 R. H. ALBRIGHT HIGH voumcs BUS STRUCTURE 8 sheets sheet 1Filed Sept. 13. 1956 Afro/4453i July 5, 1960 Filed Sept. 15, 1956 R. H.ALBRIGHT HIGH VOLTAGE BUS STRUCTURE 8 Sheets-Sheet 2 BY W, ,w KW

July 5, 1960 ALBR|GHT Y 2,944,101

HIGH VOLTAGE BUS STRUCTURE Filed Sept. 13, 1956 8 Sheets-Sheet 3 J IE' 5INVENTOR. ,ppy be #1806 84 ITE. '7

#77 TdnP/VM July 5., 1960 Filed se t. 13; 1956 R. ALBRIGHT HIGH VOLTAGEBUS STRUCTURE 8 Sheets-Sheet 4 VEN TOR. 1 19 L 4536/6/97 July 5, 1960 R.H. ALBRIGHT HIGH VOLTAGE BUS STRUCTURE 8 Sheets-Sheet 5 Filed Sept. 15,1956 July 5, 1960 R. H. ALBRIGHT 2,944,101

HIGH VOLTAGE BUS STRUCTURE Filed Sept. 13, 1956 a Sheets-Sheet 6 8Sheets-Sheet 7 R. H. ALBRIGHT HIGH VOLTAGE BUS STRUCTURE July 5, 1960Filed Sept. 13, 1956 INVENTO. ear ,4. 41 away;

BY M

July 5, 1960 R. H. ALBRIGHT 2,944,101

HIGH VOLTAGE BUS STRUCTURE Filed Sept. 13, 1956 8 Sheets-Sheet 8 UnitedStates Patent HIGH VOLTAGE BUS STRUCTURE Roy H. Albright, Greensburg,Pa., assignor to I-T-E Circuit Breaker Company, Philadelphia, Pa., acorporation of Pennsylvania Filed Sept. 13, 1956, Ser. No. 609,744 23Claims. (Cl. 174-99) My invention relates to a high voltage busstructure and more specifically is directed to a metal enclosed isolatedphase bus structure that can support voltages-of the order of 138,000volts.

The trend in electrical industry has been to utilize higher and highervoltages in distribution systems. At the present time, high voltageisolated phase bus structures are available which have voltage ratingsup to and including sixty-nine kilovolts. In constructing metal enclosedisolated phase bus structures of this rating, previously known busstructures were utilized and the phye sical dimensions thereof wereincreased so as to meet the increased dielectric requirements.

However, this approach may not be utilized in the construction of a bus.structure which must support one hundred thirty-eight kilovolts, sincethe greatly increased physical separation of the bus and its metalenclosure brings about many structural problems in supporting the busand the enclosure. Some of the problems associated with the bus housingconstruction introduced in view of the required increase in physicaldimensions of a bus which will support one hundred thirty-eightkilovolts are the torsional deflection in structural supporting members,methods for supporting the bus structure enclosure, and method foraligning the ends of adjacent enclosures so that they may be fastened toone another. e

Other problems are introduced with respect. to the actual fasteningbetween adjacent housings so as to include gasket seals and insulationbetween adjacentlenclosures which will allow for large changes indimension between adjacent enclosures due to thermal expansion andcontraction and to provide protection for the gaskets and theinsulation. 7

A still further set of problems are introduced in the construction ofthe insulator supports which support the bus within the housing. Thatis, an insulator which is loaded in compression but still allows freedomof movement to compensate for difierent rates of expansion andcontraction of enclosures and conductors is required. This problem isparticularly severe in the case of a one hundred thirty-eight kilovoltbus structure since the insulator supports are extremely long andstresses resulting from cantilever loadings thereon are much higher thanthose that have been previously encountered in lower voltage rating busstructures. r v

A still further problem .encountered isthat of corona discharge at thedisconnect switch within the metal enclosed bus structure in View of thehigher voltage rating.

It is therefore .a primary object of my invention to provide a novel busstructure for a metal enclosed isoe lated phase bus which will satisfyeachof the above noted problems and particularly the last problem forthe case of a one hundred thirty-eight kilovolt and higher bus structurewhile still being capable of being used in the lower voltage ratingssuch as sixty nine kilovolts.

The straight bus housings of my novel invention may be fabricated fromsheet metal which is rolled into semicylindrical sections andweldedtogether on longitudinal Patented July 5, 1960 seams. Since thesecylinders, however, are of a relatively large diameter or of a diametersuificient to allow the entrance of maintenance personnelrthey are quiteflexible and do not have the rigidity required for mounting on asupporting structure or for supporting the insulators and buses mountedwithin.

In order to provide the desired rigidity, I provide circular reinforcingmembers which may be fastened in any desired manner to the outside ofthe cylindrical housing. This circular reinforcing member could, forexample, be formed of channel sections which are rolled intosemicylindrical sections and then welded to the outside of therelatively flexible housing. These channel sections are morespecifically located along the axis of the cylindrical housing so thatthey will be in alignment with the insulator support member whichsupports the bus carrying insulator on the interior of the cylinder tothereby both reinforce the flexible cylindrical housing itself and toalso reinforce the particular point of the cylindrical housing whichmounts the internal insulators and is thereby subject to relatively highstresses.

Rigidity is also added to the ends of the cylindrical housing by meansof further annular reinforcing structural members which are welded tothe housing ends and provide the further function of adapting thehousing to be connected to an adjacent housing.

The previously described circular or annular reinforcing member which iswelded to the outside of the circular housing then has mounting feetattached thereto for mounting the bus enclosure to structural supportingmembers. While in the past, these mounting feet were at tached directlyto transverse structural members for supporting the bus structure, Iprovide a first longitudinal member to which the mounting feet of thebus housing are attached and thereafterfasten these longitudinalstructural members to the ultimate transverse'structural members. In soproviding this novel construction, the mounting feet need not projectbeyond the housing dimensions and as will be seen in the following, easyalignment of any bus housing is provided in either a longitudinal,transverse, or vertical position.

It is to be noted that this type of adjustable alignment is essentialfor a bus structure of this size since there will be inaccuracies infabrication of the bus structure and in view of its weight, there willbe deflection in the support members. Thus my novel constructionprovides an easy means for the alignment of any bus housing section withrespect to adjacent bus housings to be connected thereto as well as withrespect to bus housings of adjacent phases. 7

Since the longitudinal structural member is now connected to atransverse structural member, a connecting means such as a bolt passesthrough a first slotted hole in the longitudinal structural member and asecond slotted hole in the transverse structural member. These twoslotted holes lie perpendicular to one another so that the bus housingmay be shifted in either a longitudinal or transverse direction.

Alignment in a direction perpendicular to the axis of the cylindricalbus housing is obtained by providing an adjustable connection betweenthe mounting feet connected to the bus housing and the longitudinalstructural member to which it is attached. More specifically, aconcentric screw arrangement is utilized in which a first screw threadedin the mounting foot positions the mounting foot with respect to thelongitudinal structural mem. her while the second concentric screwpasses through the first adjusting screw and secures the mounting footto the longitudinal structural member.

So as to further facilitate alignment of adjacent housing sections aswell as to add to the bracing or reinforc ing of the cylindrical housingsection during transportation of the bus housing, end bracing memberswhich comprise a plurality of radially extending bracing members whichextend from the outer portion of the end of the circular housing andmeet and are fastened at the center of the housing may be used. Thepoint at which these radial members meet at the center of the circularhousing may therefore allow the aligning of buses of adjacent housingswhen two sections are to be jointed and while the individual bushousings are in transit their ends are reinforced by this braceconstruction.

Accordingly, an important object of my invention is to provide a novelhousing structure for a metal enclosed isolated phase bus which willsupport voltages of the order of one hundred thirty-eight kilovolts.

Another object of my invention is to construct a bus housing of thewalk-in type by welding semi-cylindrical sections together and impartingrigidity to the assembled sections by welding annular bracing membersalong the outside of the cylindrical housing which is axially locatedadjacent to the insulator support position within the bus housing. 7

Another object of my invention is to provide additional reinforcing of acylindrical bus housing by welding an annular shaped reinforcing memberto the end of the bus housing which reinforcing member serves thefurther pur pose of allowing interconnection between adjacent bushousings.

A still further object of my invention is to attach mounting feet to thereinforcing members of the cylindrical bus housing and to support thebus housing by fastening the mounting feet to longitudinal supportstructures and to thereafter mount the longitudinal support structure toa transverse support structure.

Yet a further object of my invention is to connect the longitudinal andtransverse support structures through slotted connecting holes tothereby allow both longitudinal and transverse adjustment of theposition of the bus housing.

Still another object of my invention is to provide adjusting means foradjusting the distance between the mounting feet of a circular bushousing and its longitudinal support structure so as to allow adjustmentof the position of the bus structure in a direction substantiallyperpendicular to the axis of the bus housing.

Still another object of my invention is to provide end bracing memberswhich extend radially inward from the end of the cylindrical housing andare connected together at aninterior point of the housing to facilitatealignment between housing sections and to further brace the cylindricalhousing during transportation thereof.

Since the bus housing for a bus system which is rated at one hundredthirty-eight thousand volts is so large, the interconnection betweenadjacent enclosures is complicated in view of the inherent inaccuraciesin the enclosure construction and the relatively large changes indimensions between adjacent enclosures due to thermal expansion andcontraction.-

In the bus structure of my novel invention, I provide very little spacebetween housing sections and weld an annular shaped support member atthe end of each bus housing section which first adds to the rigidity ofthe individual bus housing and secondly is adapted to receive a gasketwhich completes an air tight connection between adjacent units. Thegasket utilized is constructed in such a manner that it will beeffective even though housing ends are not in proper alignment or arenot concentric. It is further constructed to allow a change in thedistance between adjacent housings without being ruptured, this changein distance being due to thermal expansion and contraction or variousdeflections due to mechanical stress.

A clamping means is then positioned concentrically with the gasket whichclamping means provides the mechanical connection and alignment betweenthe two housings. This clamp is more specifically constructed to form aweatherproof connection with respect to the two housings and iselectrically insulated from the two adjacent housings so as to decreaseeddy current eifects. The clamp protects the gasket from direct exposureto rain or snow conditions and further protects the gasket from punctureor radiation from the sun. Since the clamp is electrically insulatedfrom the two adjacent covers as was previously mentioned, circulatingcurrents will be isolated within a single housing but the clamp is madecontinuous so as to provide a continuous metallic shield for aparticular bus run.

Accordingly, a further important object of my invention is to provide anovel connecting means for connecting adjacent bus housings to oneanother.

Another object of my invention is to connect an annular shapedreinforcing member to the outer periphery of the cylindrical bus housingand to further construct this reinforcing member to receive a gasketmeans for forming an air tight connection between adjacent housings.

Another object of my invention is to concentrically position a clampwith the above described gasket means for mechanically connecting andaligning two adjacent housings.

Another object of my invention is to provide a clamping means positionedconcentrically with the gasket to protect the gasket against direct sunrays, puncture and moisture.

Still another object of my invention is to construct this clamping meansin a plurality of sections so as to transmit an evenly distributedradial pressure to the ends of adjacent housings and provide acontinuation of the metallic shield between the junction of twohousings.

In my novel high voltage bus structure, the bus bars are supported by aplurality of radially extending insulators which are loaded incompression and which are supported by the bus enclosure. However, inview of the relatively large size of both insulator and housing for thecase of a one hundred thirty-eight kilovolt bus structure, the longerinsulator will be subject to considerable bending stress .due todifferent rates of expansion and contraction of the enclosures andconductors.

I therefore provide a flexible insulator support which can be adjustedin both a radially and angular direction. Hence, when the insulator andits supported bus are initially installed, the supportmember may be bothradially and angularly positioned so as to achieve the best compressionloading for the insulator and to allow both angular and radial flexingupon the occurrence of bending stress or compression stress above apredetermined value.

Accordingly, another important object of my invention is to provide anovel support means for bus structure insulators.

Another object of my invention is to provide for a novel support meansfor flexibly mounting an insulator support to thereby decreasecompression and bending stress within the insulator supported thereby.

Another object of my invention is to provide a supporting means for abus structure insulator which can adjust both the radial and angularposition of the insulator.

In providing a disconnect switch for a one hundred thirty-eight thousandvolt bus structure, the danger of corona discharge is considerablyincreased. I therefore provide a novel disconnect switch for a highvoltage bus which is supported in a bus housing of the type describedabove and is connected to adjacent bus housings in the manner heretoforedescribed. The switch current carrying parts are modified by placingcorona rings on both the movable switch members and the stationaryswitch members so as to reduce corona discharge and raise the insulationlevel. These corona rings are arranged on each side of each set ofinsulators so as to shield conductor parts, blade'parts, and insulatorsaddles supporting these parts. .The corona rings are furtherconstructed to have large radii so as to reduce the intensity ofthe'elect'ric field at thesurface of the rings and the rings are madeconcentric so that a uniform electrical field exists at their periphery.

Similarly, all sharp or small radii projections are substantiallyeliminated in the switch so as to avoid local high intensity electricfields.

Accordingly, another object of my invention is to provide'a noveldisconnect switch for a high voltage bus structure.

Another object of my invention is to place corona rings on the switchblade and the stationary conductors of the disconnectswitch of a highvoltage bus structure so as to reduce corona discharge and raise theinsulation level.

Another object of my invention is to'provide a dis connect switch for ahigh voltage bus structure in which both the housing and the means forconnecting it to an adjacent housing are of the type describedhereinabove.

These and other objects of my invention will become apparent when takenin conjunction with the drawings in which:

Figure l is a perspective view of three metal enclosed isolated phasebuses which could conduct three phase alternating current. Y

Figure 2 shows an exploded perspective view of a portion of one highvoltage bus housing which is constructed in accordance with my novelinvention and specifically illustrates the manner in which the bushousing position can be varied in alongitudinal, transverse or verticaldirection.

Figure 3 is a cross-sectional view taken through the mounting foot ofthe bus of Figures 1 and 2 and specifically illustrates the manner inwhich the bus may be adjustably positioned in a direction perpendicularto its axis.

Figure 4 shows a front view of a bus housing wherein a bracing member isconnected at its end so as to facilitate alignment of adjacent busmembers and to further reinforce the bus housing particularly duringtransportation thereof.

Figure 5 shows the manner in which the bus housing of my novel inventioncould be mounted when the bus axis is vertical.

Figure 6 is a-front view of Figure 5.

Figure 7 shows a side view of the bus of my novel invention when the bushousing is modified to form a T-connection.

' Figure 8 is a front sectional view of Figure 7.

Figure 9 is an exploded perspective view of a portion of the bus housingof my novel invention and specifically illustrates the manner in whichadjacent buses are connected together. 3

Figure 10 is a front cross sectional view taken through the point ofjunction between adjacent bus housings.

Figure 11 is a view of Figure 10 when taken across the lines 11-11 andspecifically illustrates the configuration of the member fastened to theend of each housing for reinforcing its corresponding housing andaccepting the gasket connection and the mechanical clamping connection.

Figure 12 is a fragmentary perspective view showing the manner in whichthe insulator support is attached to a cooperating support which is anintegral part of the interior of the bus housing.

Figure 13 is an exploded side cross sectional view which indicates themanner in which my novel flexible connection between the insulator andthe housing is achieved.

Figure 14 is a side cross sectional view showing the complete supportfor a single insulator.

Figure 15 is a perspective view of my novel disconnect' switch and themanner in which it is housed within my novel high voltage bus structure.

Figure 16 is a side .view of the disconnect switch of Figure 15.

Figure 15.

Housing construction The housing construction of my novel high voltagebus structure which is capable of voltage ratings of the orderof 138,000volts is most clearly seen in connection with Figures 1 through 8.

Referring first to Figure 1, a three phase isolated phase bus system isseen as comprising the buses 20, 21 and 22 which are isolated from oneanother by their metallic housings 23, 24 and 25 respectively. WhileFigure 1 shows a three phase system, it is to be understood that mynovel bus construction could be used for any type system using a housedor enclosed bus. Each of the bus housings 23, 24 and 25 are metalliccylinders which could have been formed of welded semi-cylindricalmembers. In, view of their extremely high voltage rating, which could beof the order of 138,000 volts, these housings are flexible and infurther view of their large size, manufacturing tolerances cannot beheld as well as in the case of smaller bus housings so that they may notbe of uniform size or shape.

A second bus housing section is then attached to bus housings 23, 24 and25 and comprises the T-housings 26, 27 and 28 respectively which allowfor a T-connection or, more generally, for a change in the direction ofbuses 20, 21 and 22. So that the structure of Figure 1 may begeneralized, still another housing section comprising the disconnectswitches 29, 30 and 31 is then seen as being connected to bus housings26, 27 and 28 respectively.

It is to be understood that in a complete bus distribution system thatmany straight through bus housings :such as housings 23, 24 and 25 willbe connected adjacent one another so as to. effect the desired powerdistribution .and bus housings for changing the direction of the bussuch as the T-shaped housings 26, 27 and 28 will be utilized inconjunction therewith. Similarly, disconnect switches such as switches29, 30 and 31 will be placed where desired.

In order to provide mounting of the bus housings, the bus housing 25 ofFigure 1 has a mounting foot 32 attached thereto which is secured to theannular shaped reinforcing member 33 of the housing 25. In a likemanner, other mounting feet 32 are provided along the bus housing.Although it cannot be seen in Figure 1, each of the bus housings 23 and24 are provided with mounting feet similar to the mounting feet 22 ofbus housing 25. The mounting feet 32 on one side of bus housing 25 arethen fastened to the longitudinal supporting member 34 while similarmounting feet on the other side of bus housing 25 are supported bylongitudinal supporting member 35.

ha similar manner longitudinal supporting members 136 and 37 willsupport the mounting feet of housing 23 "while longitudinal supportmembers 38 and 39 will support the mounting feet of housing 24.

Each of the longitudinal mounting structures 34 through 39 are then inturn mounted to transverse supporting structures such as the I-beams 40,41, 42 which provide the ultimate support for each of the bus housings.

'Referring now to Figure 2, which shows an exploded perspective view ofthe end of a bus housing 43 similar to the bus housings seen in Figure1, the bus housing 43 which is a circular metallic member supports thebus 44 internally positioned therein by means of the radially extendinginsulators 45, 46 and 47. In view of the required large diameter ofthecircular housing 43 for the extremely high voltage range in which mynovel bus structure can operate, the housing 43 is relatively flexibleand I therefore provide an annular shaped reinforcing member 48 ofFigure 2 which when in the assembled and dotted-line position of Figure2 is fastened "7 to the housing in any desired manner such aswelding.

Reinforcing member 48 could, if desired, be formed of two channelshapedmembers whichihave been rolled to a semi-circular form.

It isto'be notedthat the position at which insulators 45, 46 and 47 areconnected to the housing 43 registers axially with the reinforcingmember 48. Thus,.reinforcing member 48 not only reinforces therelatively flexible cylinder 43 but further provides physical strengthat points of connection of insulators 45, .46 and 47 which Will bepoints of relatively high stress in the housing.

As seen in Figures 2 and 3, a mounting foot 49 is fastened to thereinforcing member 48 in any desired manner, this mounting foot .49being a. structural aluminum channel having threaded holes 50 and 51therethrough at the base of the angle.

In a like manner, a second mounting foot is positioned on the other sideof the housing 43 and is attached to the other side of reinforcingmember 48 in a similar manner.

A longitudinal structural support member such as the I-bearn 52 is thenpositioned to mount the mounting foot 49, the I-beam 52 further mountingeach of the mounting feet which are longitudinally distributed along thefull length of housing 43. Figure 2, however, only shows one .of thesemounting feet. Thus, I-beam52 will function as did the I-beam 34 ofFigure 1 in mounting each of the mounting feet 32 of the housing ofFigure 1.

The connection between mounting foot 49 and I-beam 52 of Figures 2 and 3is affected by the bolts 53 and 54 which protrude through apertures inthe adjusting bolts 55 and 56 to mate with openings 57 and 58respectively in the I-beam 52 and as best seen in Figure 3, are fastenedby nuts 53a and 54a respectively.

The bolts 55 and 56 as seen in Figure 3 are in threaded engagement withapertures and 51 of the mounting foot 49 and butt against the surface ofLbeam 52. In view of the butting engagement between the end of bolts and56 and the surface of the I-b eam-SZ, it is clear that by rotating bolts'55 and 56 when the nuts 53a and 54a are loosened, the distance betweenmounting foot 49 and supporting Lbeam 52 will be varied. Thus the bolts55 and 56 can adjustably position the bus housing 43 of Figure 2 in adirection perpendicular to the axis of housing 43.

Thus, in operation the vertical positioning of. housing 4.3 is firstachieved through bolts 55 and 56 and the bolts 53 and 54 which arefastening bolts are then tightened in their threaded engagement with theI-beam 52 so as to maintain the mounting foot 49 in its position with respect to I-beam 52.

The longitudinal structural member, 52 may then be connected to atransverse structural member which ultimately supports the complete bushousing. As may be seen in Figures 2 and 3, the longitudinal I-beam 52is connectible to the transverse structural member or I- beam 59 bymeans of the bolt 60 which cooperates with slotted apertures 61 and 62in I-beams 52 and 59 respectively. The bolt 60 may then be fastened intoposition by its cooperating nut 63.

Apertures 61 and 62 are seen to be slotted in perpendicular directionsin Figures 2 and 3. This type of construction will therefore allowadjustment of the position of bus housing 43 in the direction of theslot 61 or the longitudinal direction as well as in the direction ofslot 62 or the transverse direction. After aligning the bus bothlongitudinally and transversely, as desired, the bolt 60 and itscooperating nut 63 may then be tightened in place so as to maintain thispositioning.

Accordingly, the structure set forth in Figures 2 and 3 will allow forlongitudinal, transverse and vertical positioning of the bus housing 43.If now this specific con- ,struction of Figures] and .Iris provided foreach bus '8 housing of a system such as the system of Figure 1, it isclear that the bus housings may be easily and ,projgrerly aligned in anydirection with respect to one another.

While the above construction of Figures 2 and 3 has been set forth forthe case in which the bus runs in a horizontal direction, this samenovel structure is easily adapted to the case of a bus running in avertical ,direction. Another adjustable connection forbus housing 43 andits supporting structure may be seen in Figures -5 and 6, which show afragmentary portion of the bus housing 43 with the mounting foot 49fastened to the I-beam 52 in any desired manner such as a boltconnection or a weld. .Here again the I-beam 52 is a longitudinalstructural member or a structural member which runs parallel to the axisof the bus housing. The longitudinal support member 52 is then providedwith a slot 64 which cooperates with aperture 65 of the angle 66. Theangle 66 is further provided with a slot 67 which cooperates with slots68 of the transverse support member or I-beam 57.

In the construction set forth in Figures 5 and 6, longitudinaladjustment of the positioning of housing 43 is effected by thepositioning of slot 64 of I-beam'52 with respect to the opening 65. Uponachieving the desired longitudinal positioning the bolt 69 and itscooperating nut 70 will lock the member 52 into the desired positionwith respect to angle 66. This position may be further maintained byproviding an additional aperture 71 in angle 66 and to use this apertureas a guide for drilling a second hole in the I-beam 52 after positioningthereof for receiving a second and reinforcing bolt connection.

Transverse adjustment and adjustment in a direction perpendicular to theaxis of the housing 43 is achieved by positioning slot ,68 of the I-beam57 with respect to the perpendicular slot 68 of the angle 66 until bus43is positioned in the desired transverse position and the desiredposition in a direction perpendicular to its axis.

The belt means 72 maythen be passed through the slots 67 and 68 tomaintain housing 43 in its adjusted position. Hence in the embodiment ofFigures 5 and v6, three dimensional adjustment of the position ofhousing .43 is achieved by interposing an auxiliary angle 66 between thesupport member 52 and the support member 57. Clearly this same type ofconstruction can be utilized for both horizontal and vertical runningbus systems.

Figures 7 and 8 show a side and front .view respectively of a bushousing for providing a T-section as has been shown in Figure l for theT-sections 26, 27 and 28. In

Figures 7 and 8, this T-section bus housing '73 is provided 3 with anopening indicated generally at '74 for connecting a bus which runsperpendicular to the axis of housing 73. This T-housing is further seenin Figure 7 as having reinforcing members 75 and 76 which are similar tothe reinforcing member 48 of Figure 2 and are further provided with endreinforcing members 77 and 78 along the length of the housing and endsection 79 for the opening 74 in the side of housing 73.

As will be described more fully hereinafter, these end reinforcingmembers 77, 7t and 79 are so adapted as to allow connection between theT-shaped bus duct unit of Figures 7 and 8 and adjacent bus duct units.

As shown in Figure 8, mounting feet 8%) and 81 are connected to thelongitudinal support members 82 and 83, respectively, which are in turnconnected to the transverse structural member 84 for the ultimatesupport of bus housing 73. As best seen in Figure 7, a second transversestructural member 85 is provided for further port the end of the bushousing, a bracing member which comprises the radially extending members86, 87, 88, 89, 90: and 91 wherein one end of these members is connectedto the end. portion 92 of a bus housing while their interior portionsare connected to a plate 93having an aperture 94 therein. The connectionof radially extending members 86 through 91 at the end of the bushousing and at the horizontally located plate 93 may be provided by anydesired means such as bolts or rivets. This bracing member then providestwo functions. The first function is clearly that additional support isgiven to the end portion 92 of the bus housing. A second function isprovided, this being that the aperture 94 in the plate 93 locates thecenter of the bus supported by insulators 95, 96 and 97 so as tofacilitate the alignment between this bus and the bus of an adjacenthousing when these two housings are connected to one another. Thus, oncethe housings are aligned with respect to one another, the bracingmembers 86 through 91 may be removed from the end portion 92 of thehousing and the two adjacent units may then be finally connectedtogether in a manner which will be described hereinafter.

, a Connection between adjacent bus housing sections v:In view of thegreater inaccuracies in housing dimensions, greater degrees ofmisalignment and increased ex-' pansion and contraction due totemperature changes of a bus housing which must serve to operate undervoltagesv of 138 kilovolts', I have invented a novel means ofinterconnecting adjacent bus housings. This method of bus housingconnection is seen in Figures 9, l and 11 where Figure 9 shows anexploded perspective view of the manner in which a housing such as thehousing of Figure 2 may be modified. Figure shows a sectional view ofthecompleted junction between two housings,

and Figure 11 shows a detailed sectional view of my novel connectingstructure. j

As seen most clearly in Figure 9, bus housing cover 43=has a ring-shapedmember 100 connected to the end thereof at the protruding flange 101 ofthe ring 100.

Therefore, this ring, as well as serving a part in the interconnectionbetween two adjacent housing sections, further serves as a reinforcingmember for the housing to which it is connected. Ring 100 then has agroove 102 out therein which is adapted to receive a flexible gasket 103which has a radially extending portion 104 which fits into and is sealedin groove \102 of the ring 100. Gasket 103 is provided with a secondradially extending portion 105 which cooperates with a groove similar togroove 102 of a ring attached to the housing 108 which is to beconnected to bus housing 42. A plurality of ring shaped clamps, two ofwhich are seen in Figure 9 'as clamps 106 and 107, then extend aroundthe circumference of ring 100 and the ring 109 of the bus housing 108 tobe connected to ring 100, these clamps maintaining the ring-shapedportions in mechanical engagement with respect to one another.

This construction may be further seen in Figure 11 where ring 100 hasthe flange 101 welded to the housing 43 and in a like manner the ring109 is welded to the housing 108. The gasket 103 then has its radiallyextending portions 103 and 105 inserted in the grooves 106 of the ring100 and 110 of the ring corresponding to the housing 108.

Figure 11 further shows the manner in which the rings 106, 107 and 108of Figures 9 and 10 are concentrically positioned with respect to thegasket 107 so that extending portion 111 and 112 of ring 107 straddlesthe shoulders of rings 109 and 101 so as to maintain a mechanicalconnection between the two housing sections 43 and 108. Once the twohousings are positioned with respect to one another, each of theplurality of clamps 106, 107 and 108 may be connected together as by thecooperating screws 113, 114 and 115 which interconnect adjacent ends ofclamps 106 and 107. While a' single clamping means could have beenutilized, it is preferable to use a plurality of clamping means so as toallow a more equal distribution of radial pressure on the bus housingjunction.

Rings 109 and of Figure 11 further have an insulating member 116 and.117 which serves to electrically insulate housings 43 and 108 from oneanother to thereby contain circulating current within only a singlehousing.

It is to be noted that gasket 103 has a U-shaped crosssection and thatextensions 111 and 112 of clamp 107 is not in direct contact with theshoulder of the rings 100 and 109. It is this novel construction thatwill allow a change in the distance between the ends of the housingsections 43 and 108 due to thermal contraction and expansion while stillforming a mechanical connection therebetween. The U-shaped constructionof gasket 103 will allow a moisture-tight connection between thehousings 43 and 108 even though these two housings may not be perfectlyaligned. After the connection of the plurality of clamps 106, 107 and108, however, the ends of the two housings 43 and 108 will for allpractical purposes be drawn into alignment with one another.

Although clamps 106, 107 and 108 of Figure 10 are seen to beelectrically insulated from housings 108 and 43 of Figure 11 by means ofinsulating spacers 116 and 117, it is to be noted that the clamps 106,107 and 108 do not intercept the metallic shielding action offered byhousings 43 and 108.

Furthermore, as well as performing a mechanical connection between thesetwo adjacent housings and completing the metallic shield, the clamps106, 107 and 108 protect the gasket 103 from direct sunlight which couldcause or accelerate deterioration of the gasket material. Similarly, theclamp protects the gasket material from puncture and also controls thecourse of Water so that there is little chance for moisture to seep intorecesses where the gasket is locked into the ring grooves 102 and 110.

Insulator support In view of the increased physical dimensions of aninsulator for supporting a bus from the bus housing when this bushousing is rated at a value of the order of 138 kilovolts, the insulatoris subject to severe problems, related to increased stresses due tocantilever forces and adjustment of the insulator position. In order toovercome these problems, I have invented a novel insulator support whichis so constructed as to flexibly mount the insulator to decrease theelfective bending stress and to furthermount the insulator so that itsposition may be adjusted in both a radial and angular position.

The perspective view of Figure 12. shows a portion of the interior ofhousing 43 and the insulator 47 which is to be connected to this housingportion. A support base 120 is fastened to the housing portion 43 in anydesired manner such as welding in an axial position along the housing 42so that the base 120 will be in registry with a reinforcing member suchas member 48 of Figure 2.

The support base 120 is then provided with four threaded apertures 121,122, 123 and 124 which will receive the mounting bolts of the insulator47. The base of insulator 47 is provided with projecting lugs seen inFigure 12 as lugs 125, 126 and 127 through which an adjusting screw andfastening screw protrude where the fastening screws of lugs 125, 126 and127 cooperate with threaded apertures 121, 124 and 123, respectively.

This particular construction may be further seen in Figures 13 and 14wherein Figure 13 shows the typical construction of any one of thefastening means carried by the insulator base 47. Thus, the adjustingscrew 128 is threaded to cooperate with the thread in lug 126 and has anaperture 129 therethrough for receiving the spacer 130a and fasteningscrew 130 which has threads 131 for cooperating with the threads 124 inthe mounting base 123.

Interposed between the head of adjusting screw 128 and fastening screw130 are the spring type washers 132 and 133. The washers 132 and 133,therefore, operate to bias the end of adjusting screw 128 intoengagement with surface 134 of the mounting base 123. Hence, ifinsulator 47 is now subjected to a counterclockwise bending stress, lug126 will bring adjusting screw 128 into deflecting engagement with thewashers 132 and 133, thereby substantially decreasing the bending stresswithin insulator 47 in view of the compression of spring means 132 and133.

In a like manner, a washer connection associated with the fasteningscrew to the right of insulator 47 will provide the flexible connectionfor rotation of insulator 47 in a clockwise direction. 1

In the most general case, it is understood that if insulator 47 weremounted by at least three fastening means of the type shown in Figures13 and 14, bending stress in any direction will be accommodated by aflexing of insulator 47 to some new angular position. In addition toproviding a novel flexibly supported connection for the insulator 47 ofFigures 13 and 14, my novel fastening between the insulator and itssupport housing will allow for adjustment of the insulator position inboth a radial and angular direction, in view of the threaded connectionbetween the adjusting screw 128 and lug 126. Hence, if it is desired toadjust the position of insulator 47 in a radial direction so as toincrease or decrease the compression thereon, each of the adjustingscrews such as adjusting screw 128 for each of the mounting lugs of theinsulator merely need be located accordingly. 7

In a similar manner, the angular position of insulator 47 may becontrolled by selectively adjusting the position of one or moreadjusting screws with respect to their cooperating insulator supportlug.

Disconnect switch A novel disconnect switch to be utilized with the highvoltage bus structure described heretofore is shown in conjunction withFigures l5, l6 and 17. Referring first to the perspective view of Figure15, the disconnect switch is mounted within. a housing 136 which has areinforcing ring 137 thereon to reinforce the housing in the mannerdescribed hereinbefore. In a like manner, mounting feet 138 and 139 areadjustably connected to longitudinal support member 140 while similarmounting feet on the other side of the bus are mounted to thelongitudinal support member 141. Longitudinal support members 140 and141 are then mountable to transverse structural support member-s forsupporting the housing section 136 in the manner described above.

Each end of the housing 136 is then provided with ring members 142 and143 which will allow connection between the housing 136 and adjacenthousing in the manner described hereinbefore in connection with Figures11, 12 and 13. At the top of housing 136 is connected the disconnectswitch operating mechanism housing 144 which supports the switch bladeinsulator 145 and 146 as will be described more fully in conjunctionwith Figures 16 and 17. Observation windows 147a and 148a are thenprovided in housing 136 so as to indicate the position of the switchblade.

Corona shields 147, 143, 149, 150, 151, i152 and 153 are connected alongthe switch and its adjacent bus structure as will be described morefully hereinafter.

Thus, the housing construction and the manner in which the two adjacenthousings are connected together is the same for the case of disconnectswitch housings as was true of the normal bus run housings describedheretofore. In a like manner, the insulators of the disconnect switchhousing are flexibly and adjustably connected to the housing wall asdescribed above in conjunction with Figures 12, 13 and 14.

As seen in Figures 16 and 17, bus bars 154 and 155 are provided with jawends 156 and 157, respectively, at

the ends thereof. Jaw ends 156 and 157 cooperate with ends 158 and 159of the switch blades 160. Switch blades 16,!) are then rigidly connectedto insulators 146 and 145 which are in turn connected to the channel 12member 16011. Channel member 160a is then slid'ably connected to guideposts such as the guide posts 161 and 162 of'Figure 16 which guide themotion of channel 160a when the operating screws 163 and 164 are rotated:by the operating mechanism 165.

Hence, upon rotation of mechanism 165; screws 16,3 and 164 are rotatedto draw channel 160a and its support insulators and 146 and the switchblade to the dotted position shown in Figure 16 to thereby completelyopen the disconnect switch.

The corona ring-s 147 through 153 serve .to reduce corona discharge andto raise the insulation level. It is seen that these corona rings arearranged on each side of the insulators so as to shield conductor parts,raised parts and insulator members supporting these parts. These ringsalong with all other conductor members are made with large sectionalradii so as to reduce the intensity of the electric field at the surfaceof the ring and conductors. Furthermore, the corona rings are madeconcentric so that a uniform electric field exists ,at-the peripherythereof.

1n the foregoing I have described my invention solely in connection withspecific illustrative embodiments thereof. Since many variations andmodifications of my invention will now be obvious to those skilled inthe art, I prefer to be bound not by the specific disclosures hereincontained but only by the appended claims.

I claim:

1. A high voltage metal enclosed bus structure comprising a metalhousing, a bus and a plurality of insulating support means axiallyspaced along said housing; each of said insulating support means beingdirectly and individually mounted on said housing to support said bus ata plurality of axially spaced locations from said housing in insulatedrelationship therewith; said housing comprising a continuous body formedof a plurality of welded sections; said continuous housing body having aplurality of axially spaced annular shaped reinforcing members fastenedto the periphery thereof for imparting rigidity to said housing; each ofsaid plurality of axially spaced annular shaped reinforcing membersbeing in .registry with a corresponding one of said plurality ofinsulating support means to thereby impart rigidity to said housing at apoint of highest stress.

2. A 'high voltage metal enclosed bus structure comprising a metalhousing, a bus and insulating support means; said insulating supportmeans being directly mounted on said housing to support said bus fromsaid housing in insulated relationship therewith; said housingcomprising a cylindrical continuous body having an an.- nular shapedreinforcing member fastened to the periphery thereof; said annularshaped reinforcing members being coaxial with the position of saidinsulating support means to thereby impart rigidity to said housing at apoint of highest stress; mounting members for mounting said housing on asupport structure; said mounting members being fastened to said annularshaped reinforcing member.

3. A high voltage metal enclosed bus structure comprising a metalhousing, a bus and a plurality of insulating support means axiallyspaced along said housing; each of said insulating support means beingdirectly and individually mounted on said housing to support said bus ata plurality of axially spaced locations from said housing in insulatedrelationship therewith; said housing comprising a continuous body formedof a plurality of welded sections; said continuous housing body having aplurality of axially spaced annular shaped reinforcing members fastenedto the periphery thereof for imparting rigidity to said housing; each ofsaid plurality of axially spaced annular shaped reinforcing membersbeing in registry with a corresponding one of said plurality ofinsulating support means to thereby impart rigidity to said housing at apoint of highest stress; mounting members for mount,-

13 A V 7 ing said housing; said mountingmembers being fastened to saidannular shaped reinforcing members.

4. Alligh voltage metal enclosed bus structure comprising a metalhousing, a bus and a plurality of insulating support means axiallyspaced along said housing; each of said insulating support means beingindividually mounted on said housing to support said bus at a pluralityof axially spaced locations from said housing in insulated relationshiptherewith; said housing comprising a continuous body formed of aplurality of welded sections; said continuous housing body having aplurality of axially spaced annular shaped reinforcing members fastenedto the periphery thereof for imparting rigidity to said housing; each ofsaid plurality of axially spaced annular shaped'reinforcing membersbeing in registry with a corresponding one of said plurality ofinsulating support means to thereby impart rigidity to said housing at apoint of highest stress; mounting members for mounting said housing;said mounting members being fastened to said annular shaped reinforcingmembers; said mounting members of each of said annularshaped reinforcingmembers being fastened to a common longitudinal structural member; saidlongitudinal structural member being constructed to be connnected totransverse structural members for supporting said bus structure.

5. A high voltage metal enclosed bus structure comprising a metalhousing, a bus and a plurality of insulating support means axiallyspaced along said housing; each of said insulating support means beingindividually mounted on said housing to support said bus at a pluralityof axially spaced locations from said housing in insulated relationshiptherewith; said housing comprising a continuous body formed of aplurality of welded sections; said continuous housing body having aplurality of axially spaced annular shaped reinforcing members fastenedto the periphery thereof for imparting rigidity to said housing; each ofsaid plurality .of axially spaced annular shaped reinforcing membersbeing in registry with a corresponding one of said plurality ofinsulating support means to thereby impart rigidity to said housing at apoint of highest stress; mounting members for mounting said housing;said mounting members being fastened to said annular shaped reinforcingmembers; said mounting members of each of said annular shapedreinforcing members being fastened to a common longitudinal structuralmember; said longitudinal structural member being constructed to beconnnected to transverse structural members for supporting said busstructure; the connnections between said housing, mounting means,longitudinal and transverse structural members being constructed toadjustably position and adjustablymaintain said housing with respect tosaid transverse structural member.

6. A high voltage metal enclosed bus structure com? prising a metalhousing having a bus supported therein in insulated relation with saidmetal housing; said housing comprising a cylindrical continuous bodyhaving an annular shaped reinforcing member fastened to the peripherythereof; a plurality of axially spaced mounting members for mountingsaid bus structure; each of said plurality of mounting members beingsupported by said housing and being-fastened to a common longitudinalstructural member; said longitudinal structural member being constructedto be connnected to transverse structural members for supporting saidbus structure; the connections between said housing, mounting means,longitudinal and transverse structural members being constructed toadjustably position and adjustably maintain said housing with respect tosaid transverse structural member. a r v 7. A high voltage metalenclosed bus structure comprising a metal housing, a bus. and aplurality of insulating support means axially spaced along said housing;each of said insulating support means being individually mounted on saidhousing to support said bus at a plurality of axially spaced locationsfrom said housing in insulated relationship therewith; said housingcomprising a continuous body formed of a plurality of welded sections;said continuous housing body having a plurality of axially spacedannular shaped reinforcing members fastened to the periphery thereof forimparting rigidity to said housing; each of said plurality of axiallyspaced annular shaped reinforcing members being in registry with acorresponding one of said plurality of insulating support means tothereby impart rigidity to said housing at a point of highest stress;mounting members for mounting said housing; said mounting members beingfastened to said annular shaped reinforcing members; said mountingmembers of each of said annular shaped reinforcing members beingfastened to a common longitudinal structural member; said longitudinalstructural member being constructed to be connected to transversestructural members for supporting said bus structure; said longitudinaland transverse structural members having slots therein; said slots insaid longitudinal bus being perpendicular to said slots in; saidtransverse structural member; said longitudinal and transversestructural members being connected to one another and adjustablypositioned with respect'to one another by connecting means passedthrough said slots.

8. A high voltage metal enclosed bus structure comprising a metalhousing, a bus and a plurality of insulating support means axiallyspaced along said housing; each of said insulating support means'beingindividually mounted on said housing to support said bus at a pluralityof axially spaced locations from said housing in insulated relationshiptherewith; said housing comprising a continuous body formed of aplurality of welded sections; said continuous housing body having aplurality of axially spaced annular shaped reinforcing members fastenedto the periphery thereof for imparting rigidity to said housing; each ofsaid plurality of axially spaced annular shaped reinforcing membersbeing in registry with a corresponding one of said plurality ofinsulating support means to' thereby impart rigidity to said housing ata point of highest stress; mounting members for mounting said housing;said mounting members being fastened to said annular shaped reinforcingmembers; said mounting members of each of said annular shapedreinforcing members being fastened to a common longitudinal structuralmember; said longitudinal structural member being constructed to beconnected to transverse structural members for supporting said busstructure; said longitudinal and transverse structural members havingslots therein; said slots in said longitudinal bus being perpendicularto said slots in said transverse structural member; said longitudinaland transverse structural members being connected to one another andadjustably positioned with respect to one another by connecting meanspassed through said slots; said longitudinal members connected to saidmounting members being adjustably positioned with respect to saidhousing in a direction perpendicular to the axis of said housing.

9. A high voltage metal enclosed bus structure comprising a metalhousing, a bus and a plurality of insulating support means axiallyspaced along said housing; each of said insulating support means beingindividually mounted on said housing to support said bus at a pluralityof axially spaced locations from said housing in insulated relationshiptherewith; said housing comprising a continuous body formed of aplurality of welded sections; said continuous housing body having aplurality of axially spaced annular shaped reinforcing members fastenedto the periphery thereof for imparting rigidity to said housing; each ofsaid plurality of axially spaced annular shaped reinforcing membersbeing in registry with a corresponding one of said plurality ofinsulating support means to thereby impart rigidity to said housing at apoint of highest stress; mounting members for mounting said housing;said mounting members being fastened to said annular shaped reinforcingmembers; said mounting members of each of said annular shapedreinforcing members being fastened to a common longitudinal structuralmember; said longitudinal structural member being constructed to beconnected to transverse structural members for supporting said busstructure; said longitudinal members connnected to said mounting membersbeing adjustably positioned with respect to said housing in a directionperpendicular to the axis of said housing.

10. A high voltage metal enclosed bus structure comprising a metalhousing having a bus supported therein in insulated relation with saidmetal housing; said housing comprising a cylindrical continuous bodyhaving an annular shaped reinforcing member rigidly and permanentlyfastened to the periphery thereof for imparting rigidity to saidhousing; said annular shaped reinforcing member being further positionedat one end of said housing and being constructed to receive gasket andclamping means for connecting said housing to an adjacent bus housing.

11. A high voltage metal enclosed bus structure comprising a metalhousing having a bus supported therein in insulated relation with saidmetal housing; said housing comprising a continuous body formed of aplurality of Welded sections; said continuous housing body having aplurality of axially spaced annular shaped reinforcing members rigidlyand permanently fastened to the periphery thereof for imparting rigidityto said housing; at least one of said annular shaped reinforcing membersbeing positioned at one end of said housing and being furtherconstructed to receive connecting means for connecting said housing toan adjacent bus housing; said connecting means including a gasketconstructed to provide a moisture proof expandable seal between saidhousing and said adjacent housing; said clamping means providingmechanical connection between said housings.

12. A high voltage metal enclosed bus structure comprising a metalhousing having a bus supported therein in insulated relation with saidmetal housing; said housing comprising a continuous body formed of aplurality of welded sections; said continuous housing body having aplurality of axially spaced annular shaped reinforcing members rigidlyand permanently fastened to the periphery thereof for imparting rigidityto said housing; at least one of said annular shaped reinforcing membersbeing positioned at one end of said housing and being furtherconstructed to receive connecting means for connecting said housing toan adjacent bus housing; said connecting means including a gasketconstructed to provide a moisture proof expandable seal between saidhousing and said adjacent housing; said clamping means providingmechanical connection between said housings; said clamping means beingelectrically insulated from said housing and forming a continuation ofthe metallic shield formed by said metal housings.

13. A high voltage metal enclosed bus structure comprising a metalhousing having a bus supported therein in insulated relation with saidmetal housing; said housing comprising a continuous body formed of aplurality of Welded sections; said continuous housing body having aplurality of axially spaced annular shaped reinforcing members rigidlyand permanently fastened to the periphery thereof for imparting rigidityto said housing; at least one of said annular shaped reinforcing membersbeing positioned at one end of said housing and being furtherconstructed to receive connecting means for connecting said housing toan adjacent bus housing; said connecting means including a clampingmeans concentrically positioned with respect to said housings formechanically connecting and aligning said housings.

14. A high voltage metal enclosed bus structure comprising a metalhousing having a bus supported therein in insulated relation with saidmetal housing; said housing comprising a continuous body formed of aplurality of welded sections; said continuous housing body having aplurality of axially spaced annular shaped reinforcing members rigidlyand permanently fastened to the periphery thereof for imparting rigidityto said housing; at least one of said annular shaped reinforcing membersbeing positioned at one end of said housing and being furtherconstructed to receive connecting means for connecting said housing toan adjacent bus housing; said connecting means including a gasketconstructed to provide a moisture proof expandable seal between saidhousing and said adjacent housing; said clamping means providingmechanical connection between said housings; said clamping means beingexternally and coaxially positioned with respect to said gasket toprotect said gasket from damage.

15. A high voltage metal enclosed bus structure comprising a metalhousing having a bus supported therein in insulated relation with saidmetal housing; said housing comprising a continuous body formed of aplurality of welded sections; said continuous housing body having aplurality of axially spaced. annular shaped reinforcing members rigidlyand permanently fastened to the periphery thereof for imparting rigidityto said housing; at least one of said annular shaped reinforcing membersbeing positioned at one end of said housing and being furtherconstructed to receive connecting means for connecting said housing toan adjacent bus housing; said connecting means including a clampingmeans concentrically positioned with respect to said housings formechanically connecting and aligning said housings; said clamping meanscomprising a plurality of sections connectible to form a concentric ringabout the. junction of said housings; said clamping means transmittingan evenly distributed radial pressure to the ends of said housings.

16. A high voltage metal enclosed bus structure cornprising a metalhousing, a bus and an insulator support; connecting means for connectingone end of said insulator support to said housing, said bus bar beingsupported in insulated relationship with respect to said housing at theother end of said insulator; said connecting means being resilientlyfastened to said housing to permit angular and radial deflection of saidinsulator to thereby absorb radial and cantilever stress, saidconnecting means being further constructed to adjustably position saidinsulator in an angular and radial direction.

17. A high voltage metal enclosed bus structure comprising a metalhousing, a bus and an insulator support; said housing comprising acylindrical continuous body having an annular shaped reinforcing memberfastened to the periphery thereof, connecting means for connecting oneend of said insulator support to said housing, said bus bar beingsupported in insulated relationship with respect to said housing at theother end of said insulator; said connecting means being resilientlyfastened to said housing to permit angular and radial deflection of saidinsulator to thereby absorb radial and cantilever stress; saidconnecting means being further constructed to adjustably position saidinsulator in an angular and radial direction.

18. A high voltage metal enclosed bus structure comprising a metalhousing, a bus and an insulator support; said housing comprising acylindrical continuous body having an annular shaped reinforcing memberfastened to the periphery thereof, connecting means for connecting oneend of said insulator support to said housing, said bus bar beingsupported in insulated relationship with respect to said housing at theother end of said insulator; said connecting means being resilientlyfastened to said housing to permit angular and radial deflection of saidinsulator to thereby absorb radial and cantilever stress; saidconnecting means being further constructed to adjustably position saidinsulator in an angular and radial direction; said annular shapedreinforcing members being coaxially positioned with said insulatorconnecting means.

19. A high voltage metal enclosed bus structure comprising a metalhousing, a bus and a plurality of radially disposed insulator supports;a plurality of connecting means for respectively connecting one end ofeach insulator support to said housing; said bus bar being supported ininsulated relationship with respect to said housing by the other ends ofeach of said insulators; each of said connecting means being resilientlyfastened to said housing to permit angular and radial deflection of itsrespective insulator responsive to radial and cantilever stress; each ofsaid connecting means being further constructed to adjustably positionsaid insulator in an angular and radial direction.

20. A high voltage metal enclosed bus structure comprising a metalhousing, a bus and a plurality of radially disposed insulator supports;said housing comprising a cylindrical continuous body having an annularshaped reinforcing member fastened to the periphery thereof; a pluralityof connecting means for respectively connecting one end of eachinsulator support to said housing; said bus bar being supported ininsulated relationship with respect to said housing by the other ends ofeach of said insulators; each of said connecting means being resilientlyfastened to said housing to permit angular and radial deflection of itsrespective insulator responsive to radial and cantilever stress; each ofsaid connecting means being further constructed to adjustably positionsaid insulator in an angular and radial direction.

21. A high voltage metal enclosed bus structure comprising a metalhousing, a bus and a plurality of radially disposed insulator supports;said housing comprising a cylindrical continuous body having an annularshaped reinforcing member fastened to the periphery thereof; a pluralityof connecting means for respectively connecting one end of eachinsulator support to said housing;

said bus bar being supported in insulated relationship with respect tosaid housing by the other ends of each of said insulators; each of saidconnecting means being resiliently fastened to said housing to permitangular and radial deflection of its respective insulator responsive toradial and cantilever stress; each of said connecting means beingfurther constructed to adjustably position said insulator in an angularand radial direction; said annular shaped reinforcing members beingcoaxially positioned with said insulator connecting means to therebyreinforce said housing at a point of relatively high stress.

22. A high voltage metal enclosed bus structure comprising a metalhousing, a bus and an insulator support; connecting means for connectingone end of said insulator support to said housing, said bus bar beingsupported in insulated relationship with respect to said housing at theother end of said insulator; said connecting means being resilientlyfastened to said housing to permit angular and radial deflection of saidinsulator to thereby absorb radial and cantilever stress, saidconnecting means being further constructed to adjustably position saidinsulator in an angular and radial direction; said connecting meanscomprising a spring member and a bolt, one end of said bolt beingfastened to said housing, the other end of said bolt being connected tosaid insulator through said spring member.

23. A high voltage metal enclosed bus structure comprising a metalhousing, a bus and a plurality of radially disposed insulator supports;a plurality of connecting means for respectively connecting one end ofeach insulator support to said housing; said bus bar being supported ininsulated relationship with respect to said housing by the other ends ofeach of said insulators; each of said connecting means being resilientlyfastened to said housing to permit angular and radial deflection of itsrespective insulator responsive to radial and cantilever stress; each ofsaid connecting means being further constructed to adjustably positionsaid insulator in an angular and radial direction; said connecting meanscomprising a spring member and a bolt, one end of said bolt beingfastened to said housing, the other end of said bolt being connected tosaid insulator through said spring member.

References Cited in the file of this patent UNITED STATES PATENTS2,229,006 Rudd Jan. 14, 1941 2,275,203 Rudd Mar. 3, 1942 2,396,131 ScottMar. 5, 1946 2,469,445 Scott May 10, 1949 2,517,435 Jensen Aug. 1, 19502,746,780 Comino May 22, 1956 2,775,643 Scott Dec. 25, *1956 2,783,299Schymik Feb. 26, 1957

